Achievements

Achievements for Oxygen Not Included are awarded in two ways: You get them for each colony with which you reach the targets (will be displayed in the Colony Summary screen), and the first time you ever get them, you'll get the Steam Achievement as well.

Steam Achievements are disabled in Sandbox mode and Debug mode (indicated by a red "X" in the Colony Summary screen). Mods, however, do not disable Steam Achievements.

Selecting an achievement in the Colony Summary screen shows detailed progress towards that achievement. You will also see there which achievements you cannot reach any more with this colony (e.g. the "Carnivore" achievement will be disabled after the 100th cycle, if not reached by then).